From 612ecf311bf253cdb0c54252854c5298aa668203 Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 4 Jun 2013 15:42:02 -0400 Subject: [PATCH] Add ARM64 (aarch64) support to s_lock.h. Use the same gcc atomic functions as we do on newer ARM chips. (Basically this is a copy and paste of the __arm__ code block, but omitting the SWPB option since that definitely won't work.) Back-patch to 9.2. The patch would work further back, but we'd also need to update config.guess/config.sub in older branches to make them build out-of-the-box, and there hasn't been demand for it. Mark Salter --- src/include/storage/s_lock.h | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/src/include/storage/s_lock.h b/src/include/storage/s_lock.h index d4a783f63d..29124b19a5 100644 --- a/src/include/storage/s_lock.h +++ b/src/include/storage/s_lock.h @@ -335,6 +335,29 @@ tas(volatile slock_t *lock) #endif /* __arm__ */ +/* + * On ARM64, we use __sync_lock_test_and_set(int *, int) if available. + */ +#if defined(__aarch64__) || defined(__aarch64) +#ifdef HAVE_GCC_INT_ATOMICS +#define HAS_TEST_AND_SET + +#define TAS(lock) tas(lock) + +typedef int slock_t; + +static __inline__ int +tas(volatile slock_t *lock) +{ + return __sync_lock_test_and_set(lock, 1); +} + +#define S_UNLOCK(lock) __sync_lock_release(lock) + +#endif /* HAVE_GCC_INT_ATOMICS */ +#endif /* __aarch64__ */ + + /* S/390 and S/390x Linux (32- and 64-bit zSeries) */ #if defined(__s390__) || defined(__s390x__) #define HAS_TEST_AND_SET -- 2.40.0